"BJP's double engine is ED and CBI. When one engine [CBI] failed now they are using another engine," he said, adding that the party is getting sleepless nights after seeing "Nobo Jowar Yatra". Last month, Banerjee was questioned for over 9 hours by the Central Bureau of Investigation in the multi-crore recruitment scam in West Bengal schools. Teacher Recruitment Scam Case: ED Issues Summon to TMC Leader Abhishek Banerjee for Questioning on June 13.